IPPROTO_IGMP 523 netinet/igmp.c ip->ip_p = IPPROTO_IGMP; IPPROTO_IGMP 229 netinet/in_proto.c { SOCK_RAW, &inetdomain, IPPROTO_IGMP, PR_ATOMIC|PR_ADDR, IPPROTO_IGMP 457 netinet/ip_input.c if (ip->ip_p == IPPROTO_IGMP) IPPROTO_IGMP 563 netinet/ip_mroute.c so->so_proto->pr_protocol != IPPROTO_IGMP)